Centrifugal ore-separator.



o. 726,948. PATENTED MAY 5, 1903. G. LAND.

GEN TR-IPUG AL ORE SEPARATOR. APPLIOATION nun M11. 26, 1902. no MODEL. 2SHEETS-SHEET 1.-..

rm: uomus PETER: co. vugro-umoq wnsmumonjii'g v No. 726,948. PATENTEDMAY 5, 1903.

G.LAND.

GENTRIFUGAL ORE SEPARATOR. APPLICATION FILED MAR. 26, 1902.

no MODEL. 2 sums-sum 2 Gordon/17am,

' UNITED STATES Patented May 5, 1903.

PATENT OFFIQE.

GORDON LAND, OF DENVER, COLORADO, ASSIGNOR TOO. H. P. BAXTER AND W. F.OAKES.

CENTRIFUGAL ORE-SEPARATOR.

SPECIFICATION forming part of Letters Patent No. 726,948, dated May 5,1903.

Application filed March 26 l 902.

To all whom it may concern:

Be it known that I, GORDON LAND, a citizen of the United States,residing at Denver, Colorado, have invented certain new and usefulImprovements in Centrifugal Ore-Separators, of which the following is aspecification.

My invention relates to improvements in centrifugal ore-separators.

The object of the invention is to provide a better means of separatingthe light or suspended matter from the heavy particles as they pass intransit mixed with water or other fluid from the operation of milling.or sluicing to the dump or waste. As is well known, the values passingaway in the form of slimes is practically lost in the methods generallyemployed for metalliferous ore separation.

It is my purpose in devising the present improvements to seek to obtainonly a single separation in the operation of my machine.

I have illustrated the invention in the accompanying drawings, in whichFigure l is a central vertical section, and Fig. 2 a plan view'withpartslbroken away.

In the drawings, A indicates a vertical stand-pipe, which is rigidlyconnected to and forms the axis of rotation of a rotary bowlB.

' The bowl is mounted upon an antifrictionbearing 0 and is driven bygears D, engaging a circular rack E on the bottom of the bowl, the gearsbeing driven in any suitable manner. The pipe A forms the dischargepipefor the waste material, as hereinafter specified, and extends downwardthrough the bearing, from which point the material discharged may be ledto waste in any suitable manner. The upper end of the pipe A, as will beseen, is located slightlybelow the upper edge or rim of the bowl. Thispipe or tube A is of suitable size to permit of the free passage of allof the water and slimes that are separated by centrifugal action duringthe rotating of the bowl. The heavy material is thrown outward bycentrifugal force and is intercepted in its departure from the center bya vertical cylindrical wall E, preferably of steel, which is arrangedpendent and held in place by suitable adj ustingrods F, which provide ameans of raising the annular intercepting wall above the bottom of therevolving bowl a sufficient distance to Serial No. 100,074. (No model.)

allow the mass of moving particles (which,

driven by centrifugal force, have filled the space within this circularwall) to escape below the outer space of the larger rotating bowl, whereby further and constant centrifugal action it is carried away into thecircular trough G provided to receive it. As it is well known that thecenter of a liquid mass in circular motion is always depressed and theouter mass raised higher, I have placed my outlet-pipein the'center ofaction, so as to permit of the escape of the lighter material near thepoint of least motion. This aflords an almost perfect means of producinga single separation of thelighter material from the heavy, the latterbeing by centrifugal force carried away from the center and against theintercepting wall, from whence it finds, partly by gravity and partly byrotary force, an outlet below to thelarger area of the rotating bowl andfinally intothe waste-trough. The separation produced-by this actiondoes not contemplate the saving of any but the very light suspendedmatter and floating slimes. When it is desirable to save values found inthe heavy material, other means should be employed to operate inconjunction therewith.

A circular depressed cone-shaped hood H is provided for the top of theoutlet standpipe, which is attached thereto and is made to rotate withit and serves as a means of separating the pulp as it enters therotating bowl from above. This is of service in scattering the mass andin freeing the contained slimes as they reach the surface, where furthercentrifugal action separates the heavy from the light. The slimes, &c.,are fed through funnel I and pipe 1.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In an ore-separator, a rotating bowl, a central supply-pipe for theore to be separated, a centrally-arranged outlet-pipe for the valuableslimes depending through the bottom of said bowl, and an interceptingsuspended cylindrical wall interposed between the central discharge andthe outer bowl and serving as a means of deflecting the heavy materialto its escape-outlet at the surface of the rotating bowl, substantiallyas described.

line with said outlet-pipe, substantially as 10 described.

In testimony whereof I affix my signature in presence of two witnesses.

GORDON LAND.

Witnesses:

HARRY E. BRIGGS, JAMES O. PARISH.

